Science and Education Publishing American Journal of Educational Research 2327-6150 4 19 2016 12 21 Examples as Mediating Artifacts in Conjecturing 1295 1299 EN Chih-Hsien Huang Ming Chi University of Technology EDUCATION20164193 10.12691/education-4-19-3 2016 9 9 2016 11 22 2016 12 19 In this paper we report a study concerning examples as mediating artifacts in conjecturing. We used activity theory as an analytical framework to analyze students' behavior and the process of conjecturing. The results show that through the guidance of proceduralized refutation model, most of the students could find the common properties by generating examples, and develop the ability of generalization and further made conjectures.